A customizable shopping trolley release key that unlocks the cart and can be removed immediately without getting stuck. 

Key Features: 

- Fully Parametric: Enter your own text via the OpenScad Customizer. Coin dimensions are pre-configured for a standard 1 Euro coin but can be adjusted for any local currency. 

- Engraved Surface: Text is cleanly debossed into the handle to keep the top surface flat, preventing it from jamming inside the lock mechanism. 

- Fast and Lightweight: Prints in 8 to 12 minutes using less than 3 grams of filament. 

- Support-Free: Flawless bed adhesion with zero supports needed. 

Multi-Color Note: The engraved lettering can be easily colored with the paint bucket tool in the slicer for high-contrast, multi-color prints.